Steam-shovel tooth.



N0- 830,960. PATENTED SEPT. 11, 1906. W. H. BATES.

STEAM SHOVEL TOOTH.

APPLICATION FILED APR.5,1906.

2 SHEETS-SHEET 1.

W flu 155.5155.- mlz'amflfiaias, INVENTOR PATENTED SEPT. 11, 1906.

W. H. BATES. STEAM SHOVBL TOOTH.

APPLICATION FILED APB.5,1906.

2 SHEETS-SHEET 2.

UNITED srAr s ra rnnr OFFICE.

W I LLIAM HURBERT BATES, OF CULEBRA, PANAMA.

STEAM-SHOVEL TOOTH.

' 'r) a. whom it may concern:

Be it known that 1, WILLIAM HURBERT BA'rEs, a citizen ofthc UnitedStates, residing at Gulebra, Panama, have invented a new and usefulSteam-Shovel Tooth, of which the following is a specification.

This invention relates to power-shovels, and has for its principalobject to provide a novel form of detachable tooth which may bev readilyrenewed when worn.

A further object of the invention is to provide a tooth that may be heldin place by a single fastening-key or similar members, so that it may bereadily detached when a new tooth is to be inserted.

A still further object of the invention is to provide a novel form offastening means which will not offer any obstruction to the movement ofthe shovel during the excavating operation and which will not tend toretard the discharge of the material from the shovel.

With these'and other objects in view, as will more fully hereinafterappear, the invention consists in certain novel features of constructionand arrangement of parts, hereinafter fully described, illustrated inthe accompanying drawings, and particularly pointed out in the appendedclaims, it being understood that various changes in the form,proportions, size, and minor details of the structure may be madewithout departing from the spirit or sacrificing any of the advantagesof the invention.

In the accompanying drawings, Figure 1 is a sectional view of a portionof a steamshovel provided with detachable teeth arranged and constructedin accordance with the invention. Fig. 2 is a transverse sec tional viewof the same on the line 2 2 of Fig. 1. Fig. 3 is a similar view on theline 3 3 of Fig. 1. Fig. 4 is a plan view of a portion of the dipper andone of the teeth, the latter being partly in section. Fig. 5 is avertical section through the forward edge of the lip of the dipper,showing a tooth in elevation. Fig. 6 is a detail perspective View ofoneof the teeth detached.

Similar characters of reference are employed to indicate correspondingparts throughout the several figures of the drawmgs.

The shovel or dipper A is of the usual construction, being provided witha front lip B, that is riveted to the lower front plate 0 andSpecification of Letters Patent. Application filed April 5, 1906. SerialNo. 850,111.

Patented Sept. 11, 1906.

than the lower shank, being arran ed to extend beyond the inner edge ofthe ip B, but that portion of the shank which extends beyond the rearedge of the li is reduced in both width and thickness an is received ina pocket 18, that is formed in a cast-metal holding-bar 19. The casting19 is in the form of an arcuate bar arranged to follow the contour ofthe bucket ordipper, and its body portion is of a thickness equal to thethickness of the lip B, so that its upper surface will form practicallya continuation of such lip and will not offer any obstruction to thepassage of the material. The projecting portions which form the pockets18 are externally of the same size as the body portion of the shank 11and receive the reduced end portions of the shanks. These pockets andthe reduced end portions of the shanks are provided with aliningopenings for the reception of locking-pins 20, which serve to hold theteeth in place, and comparatively small pins may be employed, therebeing little or no strain on these connections. The lower shankmember 12is also reduced in width and thickness at its inner end, its entirelength being about equal to the width of that portion of the lip thatprojects beyond the front plate. The reduced end portions of the shankmembers 12 are received in pockets that are formed in an arcuate bar 22,that is riveted to the lower side of the lip and is backed up by theforward edge of the front plate. The external area of the pocketedportions of the bar is about equal to the cross-sectional area of themain portion of the shank 12, so that no' obstruction beyond the area ofthe shank will be offered. The forward edge of the bar 22 is preferablytapered in order to lessen the resistance which would otherwise beoffered by the front edge of the front plate during the diggingoperation.

The detachable teeth which form the subto and the two pocketed the sametime the pocketed bars are of such construction as not to in any mannerincrease the resistance to the movement of the shovel or dipper throughthe material being excavate Iclaim 1. A di per-tooth having a bifurcatedshank, an ocketed bars arranged on both the inner an outer faces of thedipper for engagin both portionsof the shank.

2. ,di er-tooth having bifurcated shank, the and 0 said shank beinreduced and pocketed bars for engaging't e reduced portions of theshank.

3. A dippertooth having a bifurcated shank fitting over the lip of thedi er, and a bar fitting against the rear edge of tlie lip and having apocket or recess for the reception'of the inner end of the shank.

4. A dipper-tooth having a shank member arranged to fit within the lipof the dipper, a bar secured to the dipper at a .point to the rear ofthe lip, and of no greater thickness than said li-p, said bar having arecess 0r poclift for engagement with. the shank of the toot 5.Adipper-tooth having a shank extending within the lip of the dipper, theend of the shank bein of reduced cross-sectional area, a bar securewithin the dipper at a oint to the rear of the lip, and of no greater t'ckness than said lip, said bar having a pocket or recess for thereception of the reduced portion of the shank.

6. A dipper-tooth having a shank member extending within the lip of thedipper, the

end ofsaid shank being of reduced cross-seccesses. H as well as by theforward ed e of the front pi; ars, while at 7. A dipper-tooth having asliank member arranged to extend under the lip of the di per, and apocketed bar fittin against t e edge of the front plate of the ceivingsaid shank.

8. A dip er-tooth having a shank member extending elow the li of thedipper, and of reduced crossssectiona area at its end, a bar securedunder the lip at a point in advance of the ed e of the front plate, saidbar having a ta ere forward endand being provided with a s ank-receivingpocket or recess.

9. In combination, a dipper, and a dippertooth extending be 0nd the lipof said dipper, the forward edge 0 the lip, and the bodyportion of thetooth having lnterfitting portions to prevent lateral displacement ofsaid tooth.

10'. In combination, a dipper having a lip provided with a recessedfront edge, and a tooth having a shoulder fitting within said recess toprevent lateral displacement of the tooth.

11. In combination; a dipper havin a lip provided with a recess in itsfront e go a tooth having a bifurcated shank, provided with a shoulderat the. oint of bifurcation, said shoulder fitting within the recess toprevent lateral dis lacement of the tooth, and means on both th dipperfor engaging the shank. I

In testimony that I claim the foregoing as my own I have hereto afiixedmy signature in the presence of two witnesses.

L M HURBERT BATES. Witnesses;

F. H. SAMPSON,

. QGQRDILLOX.

ipper for re-- e inner and outer faces of the

